Fan modes based on temperature thresholds

Abstract

In some examples, the disclosure describes a device that includes heat generating devices, a fan, and a processor to: determine a temperature within an area of the heat generating devices, activate the fan in a pulse width modulation (PWM) mode in response to the temperature being above a temperature threshold, activate the fan in a direct current (DC) mode in response to the temperature being below the temperature threshold.

What is claimed is: 
     
         1 . A device, comprising:
 a heat generating device;   a fan; and   a processor to:
 determine a temperature within an area of the heat generating device; 
 activate the fan in a pulse width modulation (PWM) mode in response to the temperature being above a temperature threshold; 
 activate the fan in a direct current (DC) mode in response to the temperature being below the temperature threshold. 
   
     
     
         2 . The device of  claim 1 , wherein the processor is to activate the fan in the DC mode in response to the device being in a power saving mode. 
     
     
         3 . The device of  claim 1 , wherein the processor is to send a signal to a voltage regulator to activate the fan. 
     
     
         4 . The device of  claim 1 , wherein the fan includes a voltage at common collector (VCC) power range of 4 volts to 16 volts. 
     
     
         5 . The device of  claim 1 , wherein the processor is to deactivate a particular power regulator in response to the fan being activated in the DC mode. 
     
     
         6 . The device of  claim 5 , wherein the particular power regulator is a 12 volt power regulator to allow a different power regulator to provide power to the fan during the DC mode. 
     
     
         7 . The device of  claim 1 , wherein the processor is to utilize a step increase and step decrease during the DC mode based on fan acoustics. 
     
     
         8 . A non-transitory memory resource storing machine-readable instructions stored thereon that, when executed, cause a processor of a computing device to:
 monitor a temperature of an area that includes heat generating devices associated with the computing device;   instruct a power regulator to provide a fixed voltage to a fan and provide a pulse width modulation (PWM) signal to the fan in response to the temperature exceeding a temperature threshold; and   instruct the power regulator to provide a variable voltage to the fan in response to the temperature being below the temperature threshold.   
     
     
         9 . The memory resource of  claim 8 , wherein the processor is to instruct the power regulator to provide a step variable voltage to the fan in response to the temperature being below the temperature threshold and a power saving mode being activated. 
     
     
         10 . The memory resource of  claim 8 , wherein the processor is to deactivate the PWM signal to the fan in response to the power regulator being instructed to provide the variable voltage to the fan. 
     
     
         11 . The memory resource of  claim 8 , wherein the processor is to determine acoustics associated with the fan and provide the variable voltage to the fan based on the determined acoustics. 
     
     
         12 . A system, comprising:
 an enclosure including a plurality of hardware computing components;   a temperature sensor;   a fan within the enclosure;   a power regulator to provide a voltage to the fan; and   a processor to:
 determine a temperature within the enclosure based on a signal from the temperature sensor; 
 provide a pulse width modulation (PWM) signal to the fan and instruct the power regulator to provide a constant voltage to the fan when the temperature is above a temperature threshold; and 
 discontinue the PWM signal to the fan in response to the temperature being below the temperature threshold; 
 instruct the power regulator to provide direct current (DC) voltage output tuning to the fan in response to the temperature being below the temperature threshold. 
   
     
     
         13 . The system of  claim 12 , wherein the processor is to discontinue the DC voltage output tuning to the fan in response to the temperature being above the temperature threshold and provide the PWM signal to the fan while the power regulator is instructed to provide the constant voltage to the fan. 
     
     
         14 . The system of  claim 12 , comprising an acoustic sensor to determine acoustic values of the fan. 
     
     
         15 . The system of  claim 14 , wherein the processor is to instruct the power regulator to provide a step increase or a step decrease DC voltage to the fan based on the acoustic values of the fan.